What are the missing statements for #4 and #6?

A. #4: m⦨1 + m⦨2 = m⦨ABC; #6: Angles added together

B. #4: m⦨1 + m⦨2 = m⦨ABC; #6: ⦨1 and ⦨2 are supplementary

C. #4: ⦨1 and ⦨2 are supplementary; #6: m⦨1 + m⦨2 = m⦨DBC

D. #4: all angles are straight; #6: ⦨1 and ⦨2 are supplementary